<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        function Person(name,age){
            this.name = name;
            this.age = age;
            this.sayHello = function(){
                console.log('Hello,my name is'+this.name);
            }
        }
        var p1 = new Person('Jack',18);
        var p2 = new Person('Tom',19);
        console.log(p1);
        console.log(p2);
        p1.sayHello();
        console.log(p1.constructor);
    </script>
</body>
</html>